|-----handy-ruler--------------------------------------------------------|
wait4: wait4 (wait for an arbitrary process)
wait4: 
wait4: wait4 allows its user to wait for the termination of an arbitrary
wait4: process.  It acts as the standard shell command wait, but is not
wait4: restricted to waiting for child processes of the current shell.
wait4: 
wait4: 
wait4: 
wait4: 
wait4: 
wait4: